REMOVAL OF LEAD FROM SOLID MATERIALS

摘要

A leaching composition that substantially removes lead from solid materials and a method of using said composition. Preferably, the concentration of lead in the solid materials following processing is low enough that the solid materials can be reused and/or disposed of at minimal cost to the processor. Preferably, the solid materials comprise glass, such as cathode ray tube glass.

主权项

1. A method of leaching lead or other heavy metals from solid materials, said method comprising:
pulverizing the solid materials to size in a range from about 10 microns to about 3 mm; introducing the pulverized solid materials into a chemical processing vessel comprising a leaching composition to form a slurry; agitating the slurry to leach the lead or other heavy metals from the solid material into the leaching composition, wherein the leaching composition comprises at least one oxidant, at least one solvent, optionally at least one metal chelator, optionally at least one accelerator/NOx (nitrogen oxide) suppressor, and optionally at least one etchant.